Degradation of organophosphorus pesticide diazinon using activated persulfate: Optimization of operational parameters and comparative study by Taguchi's method

2015 ◽  
Vol 57 ◽  
pp. 77-90 ◽  
Author(s):  
Mohammad Hossein Rasoulifard ◽  
Mina Akrami ◽  
Mohammad Reza Eskandarian
Keyword(s):  
Comparative Study ◽  
Organophosphorus Pesticide ◽  
Taguchi’S Method ◽  
Operational Parameters ◽  
Activated Persulfate

scholarly journals Efficient Degradation of Mordant Blue 9 Using the Fenton-Activated Persulfate System

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2532 ◽  
Author(s):  
Md. Nahid Pervez ◽  
Felix Y. Telegin ◽  
Yingjie Cai ◽  
Dongsheng Xia ◽  
Tiziano Zarra ◽  
...  
Keyword(s):  
Butyl Alcohol ◽  
Textile Dye ◽  
Oh Radicals ◽  
Operational Parameters ◽  
Reaction Conditions ◽  
Tert Butyl Alcohol ◽  
Initial Ph ◽  
Fe Complex ◽  
Optimal Reaction ◽  
Activated Persulfate

In this study, a Fenton-activated persulfate (Fe2+/PS) system was introduced for the efficient degradation of Mordant Blue 9 (MB 9) as a textile dye in an aqueous solution. Results showed that the degradation of MB 9 was markedly influenced by operational parameters, such as initial pH, PS concentration, Fe2+ concentration, and initial dye concentration. Optimal reaction conditions were then determined. Inorganic anions, such as Cl− and HCO3−, enhanced the degradation efficiency of MB 9 under optimal conditions. Addition of HCO3− reduced the degradation performance of MB 9, whereas the addition of Cl− increased the degradation percentage of MB 9. In addition, quenching experiments were conducted using methanol and tert-butyl alcohol as scavengers, and methanol was identified as an effective scavenger. Thus, the degradation of MB 9 was attributed to S O 4 • − and •OH radicals. The degradation and mineralization efficiency of MB 9 was significantly reduced using the conventional Fenton process i.e., Fe2+/ hydrogen peroxide (HP) because of the formation of a Fe complex during degradation. Meanwhile, the Fe2+/persulfate (PS) system improved the degradation and mineralization performance.

Oxidative degradation of benzoic acid using Fe 0 - and sulfidized Fe 0 -activated persulfate: A comparative study

2017 ◽  
Vol 315 ◽  
pp. 426-436 ◽  
Author(s):  
Manoj P. Rayaroth ◽  
Chung-Seop Lee ◽  
Usha K. Aravind ◽  
Charuvila T. Aravindakumar ◽  
Yoon-Seok Chang
Keyword(s):  
Benzoic Acid ◽  
Comparative Study ◽  
Oxidative Degradation ◽  
Activated Persulfate

scholarly journals Comparative study on sulfamethoxazole degradation by Fenton and Fe(ii)-activated persulfate process

RSC Advances ◽  
2017 ◽  
Vol 7 (77) ◽  
pp. 48670-48677 ◽  
Author(s):  
Shizong Wang ◽  
Jianlong Wang
Keyword(s):  
Comparative Study ◽  
Activated Persulfate

Sulfamethoxazole can be effectively degraded by Fenton and Fe(ii)-activated persulfate. The concentration of oxidant has important effect on the degradation of sulfamethoxazole.

scholarly journals New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 733 ◽  
Author(s):  
Md. Nahid Pervez ◽  
Wei He ◽  
Tiziano Zarra ◽  
Vincenzo Naddeo ◽  
Yaping Zhao
Keyword(s):  
Graphene Oxide ◽  
Heterogeneous Catalysts ◽  
Degradation Mechanism ◽  
Operational Parameters ◽  
Solution Ph ◽  
Dye Pollutants ◽  
Water Purification System ◽  
Purification System ◽  
Real Wastewater ◽  
Activated Persulfate

Persulfate (PS)-activated, iron-based heterogeneous catalysts have attracted significant attention as a potential advanced and sustainable water purification system. Herein, a novel Fe3O4 impregnated graphene oxide (Fe3O4@GO)-activated persulfate system (Fe3O4@GO+K2S2O8) was synthesized by following a sustainable protocol and was tested on real wastewater containing dye pollutants. In the presence of the PS-activated system, the degradation efficiency of Rhodamine B (RhB) was significantly increased to a level of ≈95% compared with that of Fe3O4 (≈25%). The influences of different operational parameters, including solution pH, persulfate dosage, and RhB concentration, were systemically evaluated. This system maintained its catalytic activity and durability with a negligible amount of iron leached during successive recirculation experiments. The degradation intermediates were further identified through reactive oxygen species (ROS) studies, where surface-bound SO4− was found to be dominant radical for RhB degradation. Moreover, the degradation mechanism of RhB in the Fe3O4@GO+K2S2O8 system was discussed. Finally, the results indicate that the persulfate-activated Fe3O4@GO catalyst provided an effective pathway for the degradation of dye pollutants in real wastewater treatment.

scholarly journals Thermally activated persulfate treatment and mineralization of a recalcitrant high TDS petrochemical wastewater

2017 ◽  
Vol 19 (2) ◽  
pp. 72-77 ◽  
Author(s):  
Sahand Jorfi ◽  
Sudabeh Pourfadakari ◽  
Mehdi Ahmadi ◽  
Hamideh Akbari
Keyword(s):  
Ph Value ◽  
Cod Removal ◽  
Order Kinetic ◽  
Operational Parameters ◽  
Batch Mode ◽  
Thermally Activated ◽  
Toc Removal ◽  
Initial Ph ◽  
Order Kinetic Model ◽  
Activated Persulfate

Abstract Thermally activated persulfate efficiency for the treatment of a recalcitrant high TDS wastewater was investigated. The specific character of studied wastewater was high TDS content of around 23820 mg/L and BOD5/COD ratio of 0.07. Effective operational parameters including initial pH values of 3–9, reaction temperature of 40–80°C and persulfate concentrations of 0.5–5 g/L for COD removal were investigated in batch mode experiments. Removal efficiency was pH and temperature dependent. The COD and TOC removal of 94.3% and 82.8% were obtained at persulfate concentration of 4 g/L, initial pH value of 5 and temperature of 70°C after 180 min for initial COD concentration of 1410 mg/L. The pseudo first-order kinetic model was best fitted with COD removal (R2 = 0.94).

Sign in / Sign up

Export Citation Format

Share Document